Django - how add User specific Items?-CodePudding

Good day Stackoverflow, a user should be able to add multiple titles instead of always overwriting the one added title.

\\ views.py

def edit_profile(request):

    try:
        profile = request.user.userprofile
    except UserProfile.DoesNotExist:
        profile = UserProfile(user=request.user)

    if request.method == 'POST':
        form = UserProfileForm(request.POST, instance=profile)
        if form.is_valid():
            form.save()
            return redirect('/test')
    else:
        form = UserProfileForm(instance=profile)

        return render(request, 'forms.html', {'form': form, 'profile': profile})

\\models.py

class UserProfile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    title = models.CharField(max_length=1024)

    def __str__(self):
        return str(self.title)

\\forms.py

class UserProfileForm(forms.ModelForm):

    class Meta:
        model = UserProfile
        fields = ('title',)

Then the user has a form on the website where he can add the specific title.

Until now, however, every time the user fills out the title form, the value in the database is overwritten. As it should be: When a new title is added in the form, it should simply be added to it.

At the end I should have the possibility, with a Foor loop in the HTML template, to display all the added titles of the respective user.

Do you know how to do this?

CodePudding user response：

If you are using a relational database, this functionality isn't really supported for a single field. Though, if you really wanted to, you could use a JSON field to make this work.

However, it is probably a better idea to use a separate table for titles.

To do this, you need to create a new Title object like:
class Title(models.Model):

Then, create a many-to-one relationship using ForeignKey:

class Title(models.Model): 
    text = models.CharField(max_length=1024)
    user_profile = models.ForeignKey(UserProfile, on_delete=models.CASCADE)

The on_delete method is required. This particular one will delete all Titles associated with a UserProfile if a UserProfile is deleted.

Now, if you want to associate a title object with a UserProfile, you would do it like this:

profile = UserProfile(user=request.user)
title = Title.objects.create(text='My Very First Title', user_profile=profile)

For more info on many-to-one relationships in Django: https://docs.djangoproject.com/en/4.0/topics/db/examples/many_to_one/

CodePudding user response：

You can create new model and assign new with the ForeignKey field.

models.py:

class UserProfile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)

    def __str__(self):
        return ', '.join([title for title in self.titles.all()])


class UserTitle(models.Model):
    title = models.CharField(max_length=1024)
    userprofile = models.ForeignKey(UserProfile, on_delete=models.CASCADE, related_name='titles')
        
    def __str__(self):
        return self.title

views.py:

def edit_profile(request):
    ...
    if request.method == 'POST':
        ...
        if form.is_valid():
            form.instance.userprofile = request.user.userprofile
            form.save()
            return redirect('/test')
    ...

admin.py:

from django.contrib import admin
from your_app.models import UserProfile

class UserProfileAdmin(admin.ModelAdmin):
    list_display = ['id', 'user', '__str__']

admin.site.register(UserProfile, UserProfileAdmin)

settings.py:

INSTALLED_APPS = [
    ...
    'your_app',
    ...

In template, to make for loop just use:

{% for title in user.userprofile.titles.all %}
    {{ title }}
{% endfor %}

or if you need only User titles in single string:

{{ user.userprofile }}